Jun 24, 2015, 02:41 PM
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X pipe Mod today (E550)
Thread Starter
Senior Member
Joined: Dec 2007
Posts: 422
Likes: 1
From: Lafayette, LA
2011 E550
X pipe Mod today (E550)
Okay I did my X pipe mod today...
I didn't get to take the picture after because he lowered the car before i had the chance too, so this is the best i have here...
After the mod it wasn't much deeper or throaty as i expected. It still almost sounds factory. Most x pipe mode i've heard/seen online has the throaty and has deeper sound. Any ideas?
Should i have straight piped the 2ndary Cat?
Here is a clip of it.. (click below)
Another clip with a morning cold startup up (click below) Not as explosive on the startup as i thought it would be.
I didn't get to take the picture after because he lowered the car before i had the chance too, so this is the best i have here...
After the mod it wasn't much deeper or throaty as i expected. It still almost sounds factory. Most x pipe mode i've heard/seen online has the throaty and has deeper sound. Any ideas?
Should i have straight piped the 2ndary Cat?
Here is a clip of it.. (click below)
Another clip with a morning cold startup up (click below) Not as explosive on the startup as i thought it would be.
Last edited by Yosheego; Apr 14, 2011 at 06:44 PM.
Thread Starter
Senior Member
Joined: Dec 2007
Posts: 422
Likes: 1
From: Lafayette, LA
2011 E550
but maybe i lost a tiny bit of torque?...but then again it could be just me. And also, it hear more of the hissing sound when i do WOT.
Last edited by Yosheego; Apr 12, 2011 at 08:12 PM.
Out Of Control!!
Joined: Jun 2008
Posts: 10,557
Likes: 24
From: Earth
Porsche Macan S SportDesign / Ex M-B's: 11 & 10 & 06 E350's, 02 S500
I know what you mean by being letdown. Nothing more underwhelming than doing an exhaust mod and having it come out muted (or even worse, not good sounding). But I think, in the long run, it's good for an E-Class. it maintains the smooth quietness if you want, but you can hear a little bit of juice when you want.
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Senior Member
Joined: Jul 2010
Posts: 299
Likes: 0
e63 2010 W212
i think it sounds great. my e63 sounds about the same. U get the same sound with 2less cylinders and 700cc less displacement. :-)
next step is drill holes in the exhaust, that'll give a deeper sound. ;-P JK (don't do that,just a joke).
next step is drill holes in the exhaust, that'll give a deeper sound. ;-P JK (don't do that,just a joke).
@ Racing Dad
(i'm living in a smaller town, so i guess it's more money.)
Member
Joined: Apr 2004
Posts: 108
Likes: 1
From: Ashburn, VA
2008 CLK63 Black Series
Still very muted. Even with the resonators (what look like secondary cats but are not) chopped mine sounds very muted. I'd recommend an exhaust muffler change to be noticeable.
Last edited by shellx; Sep 10, 2011 at 05:41 PM. Reason: spelling
Super Member
Joined: Dec 2010
Posts: 769
Likes: 632
From: Long Island ny
2007 e350 sport. 2010 350 4matic sport. Worlds first W212 E63R self built.
I was working in a w212 last week at my shop and had to change the exhaust so I figured before I went ahead and deleted the secondary cats I'd see what they look like on the one I was fixing, well every one calls them secondary cats but there hollow straight threw just small holes in them, like a small resonator. I was under the impression that had they same inside platinum honeycones like a cat. Anyway I can't see anyone losing power at all by deleting straight threw sound restrictors. Just wanted to share what I saw when doing one.
Member
Joined: Apr 2004
Posts: 108
Likes: 1
From: Ashburn, VA
2008 CLK63 Black Series
Exactly! The "secondary cats" really are just resonators. They look like cats, but once they cut them off my car, they're hollow with the small holes like the resonator. That is why the w212 doesn't benefit from the same resonator mod as the w211 where the secondary cats are true cats. If you want sound, get a catback or modify your mufflers. The resonator mod doesn't really make that big a difference imho.
Junior Member
Joined: Jun 2007
Posts: 62
Likes: 0
MB W212; NISSAN R35; BMW E60
Are you sure the "resonators" isn't an X-pipe system already? If not then MB has tuned the car to not need an X-pipe and you could be hurting performance. An X-pipe is used to promote exhaust gas scavenging on both cylinder banks. Typically X-pipes are employed for longer stroke engine designs where the exhaust pulse sequences are farther apart. Sorry but I would say there's a 50/50 chance you are actually hurting performance with your X-pipe. Believe it or not it takes sometime and engineering to design an exhaust system and most "exhaust shops" simply are not up to the task... Anyone know what the E550 and the E350 exhaust similarities are? Maybe i'll spend sometime looking at W212 exhaust design if there's enough interest...
Junior Member
Joined: Jun 2007
Posts: 62
Likes: 0
MB W212; NISSAN R35; BMW E60
Nice! Interesting cheapie design & construction. Definitely room for improvement!
Personally I would stay away from an X-pipe unless you can prove power gains. Typically for this type of exhaust we would 3D scan it first, perform basic flow modeling, then make 3-4 prototypes verifying each theory through dyno and AFR testing. I wouldn't expect to see much gains maybe 15whp when you trade off some sound for exhaust flow... My suggestion is to get a dyno delta to see where you really are at with this Xpipe.
Personally I would stay away from an X-pipe unless you can prove power gains. Typically for this type of exhaust we would 3D scan it first, perform basic flow modeling, then make 3-4 prototypes verifying each theory through dyno and AFR testing. I wouldn't expect to see much gains maybe 15whp when you trade off some sound for exhaust flow... My suggestion is to get a dyno delta to see where you really are at with this Xpipe.
Super Member
Joined: Dec 2010
Posts: 769
Likes: 632
From: Long Island ny
2007 e350 sport. 2010 350 4matic sport. Worlds first W212 E63R self built.
Yea like I said there straight threw so deleting them would not make the car lose power at all or gain power at all, just sound. So it would be better to just delete the resonators and put straight pipes in place of them no x pipe just straight, if sound is what your looking for.
Newbie
Joined: Feb 2011
Posts: 12
Likes: 0
From: Abu Dhabi
2010 e500
i did the same mod + i have E63 rear mufflers (full E63 exterior)
here is a little acceleration from inside the car if you want to compare the sounds
http://www.youtube.com/watch?v=od-nO...yer_detailpage
here is a little acceleration from inside the car if you want to compare the sounds
http://www.youtube.com/watch?v=od-nO...yer_detailpage
MBWorld Fanatic!
Joined: Jan 2011
Posts: 1,747
Likes: 20
From: Central Pennsylvania
2012 S350 Bluetec 4Matic, Diamond White, P2
Now you just have to figure out how to mount a playing card with a clothespin on the spokes of your wheels. It will sound really fast then. Vroooom Vrooooom. lol
Seriously, there are a lot of myths surrounding the advantage of back pressure, but, it is unlikely you have made much if any difference in torque with the x-pipe mod.
Seriously, there are a lot of myths surrounding the advantage of back pressure, but, it is unlikely you have made much if any difference in torque with the x-pipe mod.
Member
Joined: Jan 2012
Posts: 93
Likes: 0
From: SOCAL
C300/E550 coupe
Hey guys i have a 2012 e550 coupe and i want to do an x pipe too in place of a resonator. For those who done it with their e550 what brands did you go for and what inlet/outlet size did you get (2.25, 2.5, or 3 inches) ?
